Okay, so I think I've a clue what's going on here. For SoaS, we're right now using a somewhat forked version of metacity, to which Sugar switched with version 0.85. Now as this metacity version differs from the one in upstream Fedora, it could be that this causes the issue. I'll create a ticket at dev.sl.o, as it concerns rather Sugar (than SoaS).
Okay, so I think I've a clue what's going on here. For SoaS, we're right now using a somewhat forked version of metacity, to which Sugar switched with version 0.85. Now as this metacity version differs from the one in upstream Fedora, it could be that this causes the issue. I'll create a ticket at dev.sl.o, as it concerns rather Sugar (than SoaS).